JP4707697B2 - 組み合わせ型光学フィルムの製造方法、その装置、組み合わせ型光学フィルム、画像表示装置、液晶パネルの製造方法および積層光学フィルムの製造方法 - Google Patents
組み合わせ型光学フィルムの製造方法、その装置、組み合わせ型光学フィルム、画像表示装置、液晶パネルの製造方法および積層光学フィルムの製造方法 Download PDFInfo
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- JP4707697B2 JP4707697B2 JP2007206960A JP2007206960A JP4707697B2 JP 4707697 B2 JP4707697 B2 JP 4707697B2 JP 2007206960 A JP2007206960 A JP 2007206960A JP 2007206960 A JP2007206960 A JP 2007206960A JP 4707697 B2 JP4707697 B2 JP 4707697B2
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- optical film
- sealing material
- film
- liquid crystal
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- Y10T156/11—Methods of delaminating, per se; i.e., separating at bonding face
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/19—Delaminating means
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Description
光学フィルムの端面同士を、隙間を設けて突き合わせる工程(1)と、
前記光学フィルムの突き合わせ部に、光学フィルムの第1片面側から第1シール材を貼着して光学フィルムを連結する工程(2)と、
前記連結した光学フィルムの突き合わせ部が、第1シール材を貼着していない光学フィルムの第2片面側に凹となるように湾曲させ、当該第2片面側の隙間を狭める工程(3)と、
前記連結した光学フィルムを湾曲させ、第2片面側の隙間を狭めた状態で、当該第2片面側の突き合わせ部に第2シール材を貼着する工程(4)と、
前記連結した光学フィルムの湾曲を解除して平坦化する工程(5)を、
有することを特徴とする組み合わせ型光学フィルムの製造方法、に関する。
工程(2)では、セパレータ面側の突き合わせ部に第1シール材を貼着し、
工程(4)では、保護フィルム面側の突き合わせ部に第2シール材を貼着し、
工程(6)では、第1シール材を、連結したセパレータとともに剥離することができる。この場合、セパレータ面側が第1片面であり、保護フィルム面側が第2片面になる。第1片面には、粘着剤層が存在しており、当該粘着剤層を用いて他の部材に貼り合せることができる。
工程(2)では、保護フィルム面側の突き合わせ部に第1シール材を貼着し、
工程(4)では、セパレータ面側の突き合わせ部に第2シール材を貼着し、
工程(6)では、第1シール材を、連結した保護フィルムとともに剥離することができる。この場合、保護フィルム面側が第1片面であり、セパレータ面側が第2片面になる。第1片面には、粘着剤層が存在しておらず、別途粘着剤層を設けて他の部材に貼り合せることができる。
光学フィルムの端面同士を、隙間を設けて突き合わせた状態で、その突き合わせ部を、光学フィルムの第1片面側から連結する第1シール機構、
前記連結した光学フィルムの突き合わせ部が、第1シール材を貼着していない光学フィルムの第2片面側に凹となるように湾曲させる凹型台座、および
前記連結した光学フィルムを湾曲させた状態で、第1シール材を貼着していない光学フィルムの第2片面側の突き合わせ部を連結する第2シール機構、
を有することを特徴とする組み合わせ型光学フィルムの製造装置、に関する。
光学フィルムの端面同士を、隙間を設けて突き合わせる工程(1)と、
前記光学フィルムの突き合わせ部に、光学フィルムの第1片面側から第1シール材を貼着して光学フィルムを連結する工程(2)と、
前記連結した光学フィルムの突き合わせ部が、第1シール材を貼着していない光学フィルムの第2片面側に凹となるように湾曲させ、当該第2片面側の隙間を狭める工程(3)と、
前記連結した光学フィルムを湾曲させ、第2片面側の隙間を狭めた状態で、当該第2片面側の突き合わせ部に第2シール材を貼着する工程(4)と、
前記連結した光学フィルムの湾曲を解除して平坦化する工程(5)を有する。
前記連結した光学フィルムの突き合わせ部が、第1シール材を貼着していない光学フィルムの第2片面側に凹となるように湾曲させる凹型台座、および
前記連結した光学フィルムを湾曲させた状態で、第1シール材を貼着していない光学フィルムの第2片面側の突き合わせ部を連結する第2シール機構、を有するものが用いられる。
(光学フィルム)
日東電工社製光学フィルム(NXP−EF・SEGK−ST03)を用いた。これは、偏光板の片面側に位相差層を形成してなる位相差層積層偏光板に係わり、セパレータ、粘着剤層、偏光板、位相差層、保護フィルムの順に積層されたものである。
第1シール材および第2シール材は、いずれも、日東電工社製のポリイミドテープ(ポリイミド粘着テープNo.360A)を用いた。幅:10mm、厚さ:53μm。前記ポリイミドテープの引張弾性率は1700MPaである。
工程(1):ポリスチレンシート(厚み500μm)上で、前記光学フィルム(垂直端面)の加工端面を突き合わせた。突き合わせ端面の隙間sの幅tは、25μmであった。
工程(2):前記光学フィルムの突き合わせ部の全部に、上側(第1片面側)から第1シール材を貼着して保護フィルム付き偏光板を連結した。
工程(3):前記連結した光学フィルムを裏返して、第1シール材を下側にした後、上側(第2片面側)に凹となるように、凹型台座の凹部内に押付することより湾曲させ、第2片面側の隙間を狭めた。第2片面側の突き合わせ端面の隙間sの幅を狭めた。
工程(4):前記連結した光学フィルムを湾曲させた状態で、第2片面側の突き合わせ部に第2シール材を貼着した。
工程(5):前記連結した光学フィルムの湾曲を解除して平坦化した。
以上の工程を経て、組み合わせ型光学フィルムを得た。
実施例1において、第1シール材および第2シール材として、積水化学工業製の軽包装用テープ(セロテープNo.252,幅:10mm、厚さ:51μm)を用いたこと以外は実施例1と同様にして、組み合わせ型光学フィルムを得た。前記セロテープの引張弾性率は2300MPaである。
実施例1において、工程(1)における突き合わせ端面の隙間sの幅tを、43μmとしたこと以外は実施例1と同様にして、組み合わせ型光学フィルムを得た。
実施例1において、工程(3)乃至工程(5)の湾曲に係わる操作を行わなかったこと以外は実施例1と同様にして、組み合わせ型光学フィルムを得た。
実施例および比較例で得られた組み合わせ型光学フィルムについて下記評価を行った。結果を表1に示す。
液晶パネル(シャープ製,アクオス,26インチ,LC−26BD1)から下板側光学フィルムを取り出し、その代わりに各例で得られた組み合わせ型光学フィルムを貼り合わせて液晶パネルを得た。この液晶パネルを電源点灯後30分放置した後に、PC接続で全面黒表示とし、暗室にて、突き合わせ部分の正面1m離れた位置から目視確認を以下の基準で行った。○:光抜けなし、△:わずかな光抜けあり、×:光抜けあり。
前記液晶パネルの裏側(下板側)から、キーエンス社製VH−5000(中倍率ズームレンズVH−Z150)により測定した。VH−5000の測定条件は、
EASY MODE:ON、
WHITE BALANCE:AUTO、
GAIN:AUTO、
SHUTTER:AUTO、
LIGHT:MAX、
IMAGE:STANDARD、
レンズ倍率:800倍、
絞りナンバー:9、
アベレージング測定(回数:4、除数:4)
ピント位置:隙間上部、
にて測定を行い、画像データはBMPファイルにて保存した。保存したBMPファイルの突き合わせ部分の隙間をデジタル画像計測・解析ソフトVH−H1A5のメイン計測の平行線モードを用いて測定した。実施例1の隙間画像を図6Aに、実施例2の隙間画像を図7Aに、実施例3の隙間画像を図8Aに、比較例1の隙間画像を図9Aに示す。
前記液晶パネルを、電源点灯後30分放置した後にPC接続で全面黒表示し、暗室にて、表面側(上板側)から、キーエンス社製VH−5000(中倍率ズームレンズVH−Z150)により測定した。VH−5000の測定条件は、
EASY MODE:OFF、
WHITE BALANCE:AUTO、
GAIN:AUTO、
SHUTTER:AUTO、
LIGHT:OFF、
IMAGE:STANDARD、
測定倍率:150倍、
絞りナンバー:9、
アベレージング測定(回数:4、除数:4)
ピント位置:隙間部分のカラーフィルター
にて測定を行い、画像データはBMPファイルにて保存した。保存したBMPファイルの突き合わせ部分の光抜けをデジタル画像計測・解析ソフトVH−H1A5のラインプロファイルにて、RGBそれぞれの輝度の最大値を読み取った。実施例1のRGBのグラフを図6Bに、実施例2のRGBのグラフを図7Bに、実施例3のRGBのグラフを図8Bに、比較例1のRGBのグラフを図9Bに示す。
x 突き合わせ端面
L1 易剥離型の保護フィルム
L2 セパレータ
P 粘着層
T1 第1シール材
T2 第2シール材
s 隙間
Claims (17)
- 複数の光学フィルムの少なくとも1つの端面を互いに突き合わせてなる組み合わせ型光学フィルムの製造方法であって、
光学フィルムの端面同士を、隙間を設けて突き合わせる工程(1)と、
前記光学フィルムの突き合わせ部に、光学フィルムの第1片面側から第1シール材を貼着して光学フィルムを連結する工程(2)と、
前記連結した光学フィルムの突き合わせ部が、第1シール材を貼着していない光学フィルムの第2片面側に凹となるように湾曲させ、当該第2片面側の隙間を狭める工程(3)と、
前記連結した光学フィルムを湾曲させ、第2片面側の隙間を狭めた状態で、当該第2片面側の突き合わせ部に第2シール材を貼着する工程(4)と、
前記連結した光学フィルムの湾曲を解除して平坦化する工程(5)を、
有することを特徴とする組み合わせ型光学フィルムの製造方法。 - 前記第1シール材及び第2シール材が、可撓性を有することを特徴とする請求項1に記載の組み合わせ型光学フィルムの製造方法。
- 光学フィルムの突き合わせ端面は、いずれも、表面および裏面に対して、略垂直であることを特徴とする請求項1または2記載の組み合わせ型光学フィルムの製造方法。
- 工程(1)において、光学フィルムは、突き合わせ端面の隙間の幅が、50μm以下になるように突き合わせることを特徴とする請求項1〜3のいずれかに記載の組み合わせ型光学フィルムの製造方法。
- 前記光学フィルムが、偏光板であることを特徴とする請求項1〜4のいずれかに記載の組み合わせ型光学フィルムの製造方法。
- 前記光学フィルムは、光学フィルムの表面に易剥離型の保護フィルムが設けられおり、および/または、裏面には粘着剤層を介してセパレータが設けられていることを特徴とする請求項1〜5のいずれかに記載の組み合わせ型光学フィルムの製造方法。
- 工程(1)乃至工程(4)を施した後、工程(5)の前、後または同時に、
前記第1シール材を剥離する工程(6)、
を有することを特徴とする請求項1〜6のいずれかに記載の組み合わせ型光学フィルムの製造方法。 - 光学フィルムが、光学フィルムの表面に易剥離型の保護フィルムが設けられおり、かつ、裏面には粘着剤層を介してセパレータが設けられているものであり、
工程(2)では、セパレータ面側の突き合わせ部に第1シール材を貼着し、
工程(4)では、保護フィルム面側の突き合わせ部に第2シール材を貼着し、
工程(6)では、第1シール材を、連結したセパレータとともに剥離することを特徴とする請求項7記載の組み合わせ型光学フィルムの製造方法。 - 光学フィルムが、光学フィルムの表面に易剥離型の保護フィルムが設けられおり、かつ、裏面には粘着剤層を介してセパレータが設けられているものであり、
工程(2)では、保護フィルム面側の突き合わせ部に第1シール材を貼着し、
工程(4)では、セパレータ面側の突き合わせ部に第2シール材を貼着し、
工程(6)では、第1シール材を、連結した保護フィルムとともに剥離することを特徴とする請求項7記載の組み合わせ型光学フィルムの製造方法。 - 請求項1〜9のいずれかに記載の製造方法により得られた組み合わせ型光学フィルム。
- 請求項10記載の組み合わせ型光学フィルムが用いられていることを特徴とする画像表示装置。
- 請求項7〜9のいずれかに記載の製造方法より得られた組み合わせ型光学フィルムにおける、第1シール材を剥離した面を、粘着剤層を介して液晶セルに貼り合せることを特徴とする液晶パネルの製造方法。
- 請求項8記載の製造方法より得られた組み合わせ型光学フィルムにおける、第1シール材を剥離した面に存在する粘着剤層を、液晶セルに貼り合せることを特徴とする請求項12記載の液晶パネルの製造方法。
- 請求項7〜9のいずれかに記載の製造方法より得られた組み合わせ型光学フィルムにおける、第1シール材を剥離した面に、粘着剤層を介して他の光学フィルムを貼り合せることを特徴とする積層光学フィルムの製造方法。
- 他の光学フィルムが、輝度向上フィルムであることを特徴とする請求項14記載の積層光学フィルムの製造方法。
- 複数の光学フィルムの少なくとも1つの端面を互いに突き合わせてなる組み合わせ型光学フィルムを製造するための装置であって、
光学フィルムの端面同士を、隙間を設けて突き合わせた状態で、その突き合わせ部を、光学フィルムの第1片面側から連結する第1シール機構、
前記連結した光学フィルムの突き合わせ部が、第1シール材を貼着していない光学フィルムの第2片面側に凹となるように湾曲させる凹型台座、および
前記連結した光学フィルムを湾曲させた状態で、第1シール材を貼着していない光学フィルムの第2片面側の突き合わせ部を連結する第2シール機構、
を有することを特徴とする組み合わせ型光学フィルムの製造装置。 - さらに、前記第2シール機構で光学フィルムの第2片面側の突き合せ部を連結後、第1シール機構によって貼着された第1シール材を光学フィルムの第1片面側から剥離する剥離機構を有することを特徴とする請求項16記載の組み合わせ型光学フィルムの製造装置。
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US8894797B2 (en) * | 2012-05-24 | 2014-11-25 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Method of splicing polarized films |
CN106909243B (zh) * | 2015-12-22 | 2023-08-15 | 宸鸿科技(厦门)有限公司 | 保护盖板及其制造方法 |
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US8303760B2 (en) | 2012-11-06 |
KR20080039233A (ko) | 2008-05-07 |
JP2008134598A (ja) | 2008-06-12 |
US7867354B2 (en) | 2011-01-11 |
US20110132532A1 (en) | 2011-06-09 |
KR101375461B1 (ko) | 2014-03-18 |
US20080099128A1 (en) | 2008-05-01 |
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